Question

which lipid acts as a chemical messenger?
adipose tissue
cholesterol
testosterone
beeswax

Explanation:

• Adipose tissue is a storage form of fat and not a chemical messenger.
• Cholesterol is a structural component of cell membranes and precursor for some hormones but not directly a chemical messenger in the sense of signaling like a hormone.
• Testosterone is a steroid hormone (a type of lipid - derived molecule). Hormones act as chemical messengers, traveling through the bloodstream to target cells and exerting specific effects.
• Beeswax is a structural lipid used for protection (e.g., in beehives) and not a chemical messenger.

Answer:

Testosterone.